There's a level of engineering judgement involved here though. If product A has passed testing and I made minor changes and made a product B if I can avoid run

There's a level of engineering judgement involved here though. If product A has passed testing and I made minor changes and made a product B if I can avoid running the whole battery of tests as if product B is brand new and not derivative then I totally will and Aerospace and Automotive operate like this all the time in every country in the world it's not poor practice.